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Finding the Fourth Proportional to 272,367.80, 408,065.70 and 131,816.60

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Solution

The fourth proportional to 272,367.80, 408,065.70 and 131,816.60 is: 197,489.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,367.80 : 408,065.70 = 131,816.60 : x
  2. Step 2: Convert to fraction form
    272,367.80/408,065.70 = 131,816.60/x
  3. Step 3: Cross multiply
    272,367.80x = 408,065.70 × 131,816.60
  4. Step 4: Simplify right side
    272,367.80x = 53,789,833,150.62
  5. Step 5: Solve for x
    x = 53,789,833,150.62/272,367.80
  6. Step 6: Final answer
    x = 197,489.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.